A member asked:

Will a vanishing twin (lost at 7 weeks) affect first trimester downs syndrome testing with blood test and ultrasound?

A doctor has provided 1 answer
Dr. Carline Louis-Jacques answered

Specializes in Obstetrics and Gynecology

Vanishing twin: No, it would not affect your test result. Ultrasound would show it for a while, but the developing twin will eventually grow big enough to hide it from view.

Answered 5/5/2015

2.9k views

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